Jaylen Brown’s finishing key to Celtics’ success against Nets

Jaylen Brown has never had a problem with athleticism. He entered the NBA as a tantalizing blend of raw quick twitch muscle, leaping ability, and strength. A loose handle and a paucity of touch limited Brown’s ability to fully leverage his lightning quick first step and explosiveness headed towards the basket in his first several years in the league.

Brown made just 58 percent of his shots at the rim in his first two seasons with the Boston Celtics, per Cleaning the Glass, ranking him in the 42nd and 33rd percentile league-wide in consecutive campaigns, but Boston’s precocious young wing has built out his game over the last four years. Brown now has a deep bag of dribble moves and finishes…